usb: mtu3: skip getting extcon when use manual drd switch

When use manual drd switch, extcon is not used in fact, so no
need get it even it exists, just skip it like using role switch.
Signed-off-by: NChunfeng Yun <chunfeng.yun@mediatek.com>
Link: https://lore.kernel.org/r/1622182260-23767-5-git-send-email-chunfeng.yun@mediatek.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/mtu3/mtu3_plat.c

@@ -299,7 +299,10 @@ static int get_ssusb_rscs(struct platform_device *pdev, struct ssusb_mtk *ssusb)
 		of_property_read_bool(node, "enable-manual-drd");
 	otg_sx->role_sw_used = of_property_read_bool(node, "usb-role-switch");
 
-	if (!otg_sx->role_sw_used && of_property_read_bool(node, "extcon")) {
+	if (otg_sx->role_sw_used || otg_sx->manual_drd_enabled)
+		goto out;
+
+	if (of_property_read_bool(node, "extcon")) {
 		otg_sx->edev = extcon_get_edev_by_phandle(ssusb->dev, 0);
 		if (IS_ERR(otg_sx->edev)) {
 			return dev_err_probe(dev, PTR_ERR(otg_sx->edev),